Journal of Applied Sciences ›› 2024, Vol. 42 ›› Issue (5): 733-746.doi: 10.3969/j.issn.0255-8297.2024.05.002

• Signal and Information Processing • Previous Articles    

Change Detection of 3D Mural Surface Based on Multi-view Contour Points of LiDAR Data

XIAO Kairong1, MENG Qingxiang1,2, YANG He3, GONG Yuanfu4   

  1. 1. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, Hubei, China;
    2. Hubei Luojia Laboratory, Wuhan 430079, Hubei, China;
    3. Transportation Development Center of Henan Province, Zhengzhou 450003, Henan, China;
    4. Hubei Institute of Land Surveying and Mapping, Wuhan 430010, Hubei, China
  • Received:2024-01-28 Published:2024-09-29

Abstract: In this paper, we propose a novel method for detecting changes in 3D mural surfaces. This method processes the mural point cloud data by point cloud alignment and principal component analysis (PCA) algorithm. It extracts the feature contour lines using Gaussian sphere mapping in the direction of multiple lines of sight. Combined with voxel grid shifting and four-dimensional surface fitting techniques, accurate detection of geometric changes of frescoes is achieved. The practical application results demonstrate significant advantages in detection accuracy and efficiency, which is of great value for the protection and restoration of ancient cultural relics.

Key words: three-dimensional mural, point cloud, contour points, change detection

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